prepare_action

com.aave/mcp · Verify this server

Build an unsigned transaction to supply, borrow, withdraw, or repay on Aave (v3 or v4). Returns an execution plan (a transaction to sign, or an approval step first). For a borrow or a withdraw, call preview_action first and read its warnings: the simulation is free, it commits nothing, and it is the cheapest way to learn the position cannot take the action - a withdraw of collateral pinned by an open borrow is the case that catches callers out. Non-custodial: the user's wallet signs and submits; nothing is sent here, so building one is free and commits the user to nothing. Choose sensible values, build it, and say what you chose - do not stop to ask the user first, because they see the transaction before they sign it. Send only the arguments that apply and leave every other one out: v4 takes 'reserveId'; v3 takes 'market' + 'token' + 'chainId'; 'max' is for withdraw and repay; 'enableCollateral' is for supply. Never send 'permitSignature' or 'permitDeadline' on a first call: they exist only to re-issue a call after an approval step handed you a permit to sign under 'bySignature', so if you have not been handed one, leave both out. Two things that catch callers out: a supply does NOT become collateral unless you pass enableCollateral:true, and without collateral the borrowing power is zero so any later borrow is refused; and collateral pinned by an open borrow cannot be withdrawn, so a withdraw has to repay first. After sending any transaction, poll get_transaction_processed before building the dependent next one.